18162241 has 4 divisors (see below), whose sum is σ = 18182484. Its totient is φ = 18142000.

The previous prime is 18162217. The next prime is 18162259. The reversal of 18162241 is 14226181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10758400 + 7403841 = 3280^2 + 2721^2 .

It is a cyclic number.

It is not a de Polignac number, because 18162241 - 2¹¹ = 18160193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18162281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8710 + ... + 10591.

It is an arithmetic number, because the mean of its divisors is an integer number (4545621).

Almost surely, 2^18162241 is an apocalyptic number.

It is an amenable number.

18162241 is a deficient number, since it is larger than the sum of its proper divisors (20243).

18162241 is an equidigital number, since it uses as much as digits as its factorization.

18162241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20242.

The product of its digits is 768, while the sum is 25.

The square root of 18162241 is about 4261.7180807745. The cubic root of 18162241 is about 262.8591775514.

The spelling of 18162241 in words is "eighteen million, one hundred sixty-two thousand, two hundred forty-one".